One can’t do extreme sports _________ he or she has had some training.
#31217
A
if
B
unless
C
once
D
since
推荐题目
The film of “ Great Earthquakes” directed by Chinese director Feng Xiaogang, _______ is reported, won the most medals in Harbin Film Festival on January15th, 2011.
#32104
A
as
B
until
C
although
D
If
Loulan City is not at all ________ a traveler who has never seen the desert before can expect.
#32335
A
that
B
where
C
what
D
which
The pretty girl is always busy helping her mother with the housework _________ I go to visit her family.
#32122
A
every time
B
every time when
C
at every time
D
however time
Mike had just finished his lunch and was about to take a break _____ an unexpected visitor came.
#33274
A
when
B
while
C
so
D
for